Liferay 7.0数据从一个数据库迁移到另一个数据库

I'm using Liferay 7.0 with the Default Database(HSQL DB) and have many sites,pages and users in it. I'm trying to configure the portal to access mySql DB and it worked. But, I want all the Content in the previous Database in the newly configured mySql Database and Database Migration in Server Administration doesn't work. How do I overcome this? I'm using Liferay 7.0 with the Default Database